OpenAI reports counterexamples to metric-entropy duality

For every proposed constants a,b≥1, some origin-symmetric convex body K in a finite dimension violates Pietsch’s proposed dimension-free covering-entropy comparison with the cube: log N(K,B∞)>b log N(B∞°,a⁻¹K°).

Sources for this record

What was already known

Dimension-free metric-entropy duality was known in special geometric regimes and with dimension-dependent losses. Pietsch’s unrestricted constant-factor comparison remained conjectural.

AI involvement AI-led

OpenAI credits itself as manuscript author and states that its internal frontier model produced the results in this release. Individual human input is not detailed enough to establish task-only autonomy.

OpenAI is named as author on the manuscript, and its release attributes the results to an internal frontier model. The individual human input is not detailed enough to establish autonomy.

Importance Major

Disproves the universal metric-entropy duality conjecture even with a cube as the covering body.

Limitations

The counterexample dimension depends on the proposed constants; the claim does not fix one dimension for all a and b.

Technical verification Formal (Lean 4)

OpenAI reports a Lean proof matching the selected claim.

Formal checking

The pinned Lean note proves the failure for every a,b≥1 and also records a vanishing dual-to-primal entropy ratio family.

Checker
OpenAI-reported Lean 4 / Comparator
Scope
For every proposed constants a,b≥1, some origin-symmetric convex body K in a finite dimension violates Pietsch’s proposed dimension-free covering-entropy comparison with the cube: log N(K,B∞)>b log N(B∞°,a⁻¹K°).
Basis
Reported by the linked checker
Evidence source

Checking a formal statement does not establish that it matches the original problem.

Human understanding Few

Few is the default when evidence for a higher level is insufficient. No named person is documented as explaining the central argument for this assessed contribution.

Correction and publication history

2026-10-18 · publication

Primary manuscript, attribution, prior-work, and scoped checking review for non-notifying local inclusion.

Read this published revision